Yankee Hill Machine Co Dust Cover, 300 Blackout, AR Rifles, Black

Description

The Yankee Hill Machine Co Dust Cover is a caliber-marked replacement dust cover designed for AR rifles chambered in 300 Blackout. It is engraved with the 300 BLK caliber marking on the exterior face, and because of this, it makes it immediately clear which caliber the upper receiver is built for — a useful feature for shooters who run multiple uppers. As a result, the YHM Dust Cover eliminates any guesswork when swapping between different caliber builds.

In addition, this assembly includes the dust cover, rod, retaining clip, and spring — everything needed for a complete, drop-in installation. Furthermore, the caliber-marked design is ideal for those who may change the caliber of their top end or upper receiver over time. Moreover, it fits standard AR rifle upper receivers and installs the same way as any factory dust cover. When building or rebuilding a 300 Blackout AR upper, the YHM Dust Cover provides a clean, professional finish that identifies the build at a glance.

However, this dust cover is sized and marked specifically for 300 Blackout AR builds. Therefore, confirm your upper receiver is a standard AR-pattern receiver chambered in 300 Blackout before ordering the Yankee Hill Machine Dust Cover.

YHM Dust Cover Key Features

• Caliber-marked dust cover for 300 Blackout AR rifles
• Includes dust cover, rod, retaining clip, and spring
• Complete drop-in assembly — no additional parts needed
• Fits standard AR rifle upper receivers
• Color: Black

Specifications

The ejection port dust cover is a spring-loaded hinged cover that protects the interior of the upper receiver from debris, dust, and fouling when the rifle is not in use or being transported. The cover snaps open automatically when the charging handle is retracted or the bolt carrier moves rearward, and can be manually opened or closed at any time. Dust covers with caliber markings are a common way to identify the chambering of a build at a glance, which is useful when running multiple AR-platform rifles in different calibers. The stamped caliber designation is clearly visible when the cover is closed and helps prevent loading the wrong ammunition. Installs on the standard AR-15 ejection port cover pin location and is compatible with standard mil-spec upper receivers. No special tools are required for installation beyond a punch to drive the cover pin.